Really not difficult, surprised you horse guys are lost, if u risked 2$ on 2 horses both of which were 8:1 you'd be risking 2$ twice (4$) to win a profit of 16$ or total payout of 18$, sports betting you risk $ on either points or a moneyline, if moneyline u risk whatever you want at the price and multiply wager by odds, this will be your profit, you don't count wager size as part of the payoff